#173181#173181

#173181 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.9% C 0.139 H 265.6°. Best body text is #FFFFFF at 11.71:1 contrast (WCAG AA passes).

Color values

HEX	#173181
RGB	rgb(23, 49, 129)
HSL	hsl(225, 70%, 30%)
HSV	hsv(225, 82%, 51%)
CMYK	cmyk(82.2%, 62%, 0%, 49.4%)
CIE-LAB	lab(23.55, 21.90, -47.81)
CIE-LCH	lch(23.55, 52.59, 294.61°)
OKLab	oklab(34.91% -0.0105 -0.1382)
OKLCH	oklch(34.91% 0.139 265.6)
XYZ	xyz(5.4127, 3.9631, 21.2443)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173181 #816717

analogous

#176681 #173181 #321781

triadic

#173181 #811731 #318117

tetradic

#173181 #811766 #816717 #178132

square

#173181 #811766 #816717 #178132

split-complementary

#173181 #813217 #668117

monochromatic

#050A1A #0E1D4D #173181 #2045B5 #375FDB

Accessibility & contrast

On white

11.71

#173181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#173181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173181

11.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173181	#FFFFFF	#000000	##FFFFFF
##173181	1.00	11.71	1.79	11.71
#FFFFFF	11.71	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D84

Deuteranopia (green-blind)

#00337F

Tritanopia (blue-blind)

#004554

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173181;
/* rgb */ color: rgb(23, 49, 129);
/* oklch */ color: oklch(34.9% 0.139 265.6);

Tailwind

colors: {
  custom: {
    50: '#6868a6',
    500: '#173181',
    950: '#000000',
  },
}

SCSS

$custom: #173181;
$custom-light: #6868a6;
$custom-dark: #000000;

JSON

{
  "hex": "#173181",
  "rgb": {
    "r": 23,
    "g": 49,
    "b": 129
  },
  "hsl": {
    "h": 225.283,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.34914,
    "c": 0.13863,
    "h": 265.6
  },
  "luminance": 0.03964
}

Semantic roles & 50–950 ramp

primary

#173181

secondary

#B5983E

accent

#C13BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #173181

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →